JPH10127201A - Artificial fishing bank using dredged spoil, sludge or coal ash, its production and its production apparatus therefor - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a method for producing an artificial fishing bank by taking advantage of dredged spoil, sludge or coal ash. SOLUTION: A fishing bank material such as dredged spoil mixed with a hardening material, etc., is placed in a mold 3 sunk and laid on the bottom of the water at a place for installing a fishing bank. After the curing of the fishing bank material, the mold 3 is removed to directly install the artificial fishing bank made of dredged spoil, sludge or coal ash, having a structure following the mold 3 at the position for laying the fishing bank.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an artificial reef formed by using dredged soil, sludge and coal ash, a method for producing the artificial reef, and an artificial reef manufacturing apparatus for producing the artificial reef. is there.

[0002]

2. Description of the Related Art As artificial reefs provided on the seabed, wastes such as waste vessels have been used.
The artificial reef itself transports concrete blocks made on land over the sea and lowers it on the sea floor at the site.

[0003]

However, such artificial reefs on the seabed require transportation costs in addition to production costs, and artificial reefs that can be transported at one time are somewhat limited. Had become.

[0004] On the other hand, there is a problem in dumping and disposal of dredged soil, sludge and coal ash, and methods for safely disposing of a large amount of dredged soil, sludge and coal ash are being studied.

[0005] It is an object of the first invention according to the present application to provide an artificial fishing reef that effectively uses dredged soil, sludge, and coal ash.

An object of a second invention according to the present application is to provide a method for manufacturing an artificial reef that can produce an artificial reef directly on the sea floor using dredged soil, sludge, and coal ash, and that does not require transportation. It is in.

A third object of the present invention is to provide an artificial reef manufacturing apparatus which can safely and easily manufacture an artificial reef on the sea floor using dredged soil, sludge, and coal ash.

[0008]

Means for Solving the Problems An artificial reef for realizing the object of the first invention according to the present application is an artificial reef structure obtained by mixing dredged mud, sludge or coal ash with a solidifying material and solidifying it. The inside of the pipe member provided in the artificial fishing reef structure is a dwelling for fish and shellfish.

A method of manufacturing an artificial reef which achieves the object of the second invention according to the present application is to form a dredged soil, sludge or coal ash mixed with a solidified material in a form sunk on the water bottom at a location where the reef is installed. After casting and solidification of the dredged mud, sludge or coal ash, the formwork is unframed, so that a dredged mud, sludge or coal ash artificial reef constructed in accordance with the formwork is directly installed at the reef installation site. At the bottom of the water.

[0010] An artificial reef manufacturing apparatus for realizing the object of the third invention according to the present application comprises a mold in which a pipe member serving as a seafood dwelling is detachably mounted from a mold, and solidified on the mold. A reef material casting device that supplies dredged soil, sludge or coal ash mixed with wood to the formwork via a casting pipe, and a ship equipped with the casting device, and installs an artificial reef Artificial reefs can be produced directly on the seabed in waters.

[0011]

BEST MODE FOR CARRYING OUT THE INVENTION

(First Embodiment) FIG. 1 is a schematic view showing a first embodiment of an artificial reef manufacturing apparatus according to the present invention.

In FIG. 1, reference numeral 1 denotes a processing boat equipped with a fishing reef material setting device 2 serving as an offshore manufacturing base for artificial fishing reefs, 3 denotes a fishing reef form submerged on the seabed or the like, and 4 denotes a fishing reef form. Reference numeral 5 denotes a casting tube such as a flexible tube for supplying the reef material in a flowing state from the reef material placing device 2 to the reef formwork 3; This is a silt protector that prevents The reef form 3 is sunk on the bottom of the water by a crane (not shown) in a state assembled by the work boat or the processing boat 1, and the crane is mounted on the work boat or the processing boat.

The fishing reef material placing apparatus 2 of the present embodiment adjusts dredged soil or the like containing lumps or the like into a flow state of ready-mixed concrete, injects solidified material such as cement into the adjusted dredged soil or the like, and stirs and mixes. A mixer 22 is attached to a lower outlet of a hopper 21 into which dredged soil and the like are charged, and a mixer 22 is supplied to the casting pipe 5.
The dredged mud and the like are conveyed in the horizontal direction while stirring, and are discharged as solidified material mixed treated soil. An inlet for the solidified material is provided in the stirring section of the mixer 22, and a predetermined amount of the solidified material is injected from a solidified material injection device (not shown). The mixer 22 continuously supplies the mixed soil to the casting pipe 5, and the mixed soil is solidified in the form 3.

FIG. 2 is a perspective view of the mold 3. Formwork 3
The four side surfaces excluding the top and bottom are formed in a box shape surrounded by a frame plate 31, and a plurality of steel pipes 32 are arranged between the opposed frame plates 31 and have a role as a reinforcing material, As shown in FIG. 3, the flange formed at the end of the steel pipe 32 with respect to the frame plate 31 is provided with a bolt 33a and a nut 33b.
It is fixed with screws. The steel pipe 32 serves as a fishway of an artificial reef, and the inside of the steel pipe 32 serves as a seafood dwelling. If the frame plate 31 has strength enough to withstand mud pressure, the steel pipe 3
2 does not need to communicate between the opposing frame plates.

As shown in FIG. 4, the frame plate 31 on the four sides constituting the outer wall of the formwork 3 has its butting ends fixed removably by bolts and nuts.

When the mud containing the solidified material is supplied from the casting pipe 4 into the form 3 until it is full, the casting pipe 5 is removed and curing is performed.

When curing is completed and a predetermined hardness is obtained, a diver makes use of a frame plate 31 and a steel pipe 32 shown in FIGS.
The connection between the bolts and nuts and the connection between the bolts and nuts of the frame plates are released, the frame plates are deframed by a crane, and the solidified mud is used as an artificial reef structure, and the steel pipe 32 in the artificial reef structure is removed. An artificial reef with a fishway inside and a seafood house inside is obtained.

The four frame plates 31 constituting the formwork 3 can be removed by placing them on an artificial reef by lifting them with a crane without completely removing them only by loosening the screws at the butted portions. . Therefore, it is possible to recycle the unframed frame plate by lifting it from the bottom of the water onto the barge, attaching steel pipes, and retightening the frame plates.

Note that a plastic pipe may be used instead of the steel pipe serving as the fishway.

Further, as a reef material placing apparatus, a mixed soil is stored in a pumping tank, and the mud is pumped by compressed air supplied into the tank, or a pumping method such as a hydraulic piston pump. You may use something.

(Second Embodiment) FIGS. 5 and 6 show a second embodiment.

In this embodiment, as shown in FIG. 5 (a), with respect to the frame plates 31 on the four sides of the mold 3, one of the abutting portions a is connected to each other by a hinge member.
The other opposed portion b is connected to each other by a hydraulic or pneumatic cylinder device 34 as shown in FIG.
4 is operated from a work boat, and the formwork 3 is formed in a diamond-shaped connection form as shown in FIG. A positioning plate 35 is fixed to one frame plate 31, and an end of the other frame plate 31 contacts the positioning plate 35, and is held and fixed in a state where one frame plate and the other frame plate abut at right angles. Is done. Note that the cylinder device 34 is appropriately provided above and below so as to obtain a sufficient fastening force.

(Third Embodiment) FIG. 7 shows a third embodiment.

In this embodiment, hinge members 36 are provided at four corners where four frame plates 31 abut against each other, and one frame plate 3
Cylinder rod 3 of cylinder device 37 fixed to 1
8 can be inserted into and removed from the hole of the hinge member 36.
Therefore, when the cylinder rod 37 is contracted by operating the cylinder device 37 from the work boat, the connection between the frame plates 31 is released.

In each of the embodiments described above, dredged soil solidified by a solidifying material is used as fishing reef material, but sludge or coal ash solidified by a solidifying material may be used.

[0026]

According to the first aspect of the present invention, a dredged mud, sludge or coal ash obtained by mixing and solidifying with a solidifying material can be used as an artificial fishing reef. Disposal site (disposal site) can be provided.

According to the second aspect of the present invention, an artificial reef can be manufactured at a location where the artificial reef is installed.

According to the third aspect of the present invention, the artificial reef can be directly manufactured on the seabed in the water area where the artificial reef is installed.

[Brief description of the drawings]

FIG. 1 is a schematic diagram of an artificial reef manufacturing apparatus showing a first embodiment of the present invention.

FIG. 2 is a perspective view of the mold of FIG. 1;

FIG. 3 is a partially detailed view of the mold shown in FIG. 2, showing a connection state between a steel pipe and a frame plate.

FIG. 4 is a view showing a connection state between frame plates of the mold shown in FIG. 2;

FIG. 5 is a schematic view of a mold showing a second embodiment,
(A) shows the fixed state, and (b) shows the unframed state.

FIG. 6 is a detailed view of the cylinder connecting device of FIG. 5;

FIG. 7 shows a formwork connection device according to a third embodiment,
(A) is a side view, (b) is a top view, (c) is a side view showing a connected state of a cylinder device and a hinge.

[Explanation of symbols]

 REFERENCE SIGNS LIST 1 processing boat 2 fishing reef material placing device 21 hopper 22 mixer 3 fishing reef form 31 frame plate 32 steel pipe 33 a bolt 33 b nut 34 cylinder device 35 positioning plate 36 hinge member 37 cylinder device 38 cylinder rod

Claims (3)

[Claims] 1. An artificial fishing reef structure formed by mixing and solidifying dredged mud, sludge, or coal ash with a solidifying material, and a pipe member provided in the artificial fishing reef structure is used as a fishway for fish and shellfish. An artificial reef characterized by the following. 2. A reef material such as dredged soil, sludge or coal ash mixed with a solidified material is poured into a formwork settled on the water floor at a fishing reef installation site, and after curing of the reef material, the formwork is formed. A method for producing an artificial reef, comprising: providing an artificial reef made of dredging mud, sludge, or coal ash having a structure according to the formwork directly on the bottom of a reef installation site by removing the frame. 3. A formwork in which a pipe member serving as a house for fish and shellfish is detachably mounted from a formwork, and a dredge, sludge or coal ash which is mixed with a solidified material is poured into the formwork. An artificial reef manufacturing apparatus, comprising: a reef material driving device for supplying the formwork to the formwork via a cradle; and a boat on which the driving device is mounted.